Boiler



July 2, 1935. M MR H A, 2,006,782

BOILER Filed April 11, 1931 -1OI1UL) 0 000 000000 D 000 v o u oooooouuooouo IHQILII ooooonuunnonnuo Mia/2062 Z lisp/7a Edward ZZzer INVEN TOR-5 A TTORN E YS.

Patented July 2, 1935 PATENT OFFICE BOILER Michael Zier and Edward M.Zier, New Albany, Ind., assignors to Helen K. Zier and Rozine B. Zier,both of New Albany, Ind;

Application April 11, 1931, Serial No. 529,434

, 3 Claims.

and replaced when necessary and in which the maximum amount of heat maybe obtained from the use of a minimum amount of fuel.

Another object of our invention resides in the provision of a boiler ofthe character described in which an outer casing and inner chamber areprovided, the water tubes extending through the heads of the innerchamber and communicating with the interior of the outer casing, and theheat being introduced directly into the inner chamber and into directcontact with the water tubes.

A further object resides in the provision of means whereby the heat isdirected into the inner chamber or combustion chamber at a point abovethe surface of the lower head, this means allowing the heat to bedirected into the chamber and into contact with the water tubes so as tosecure the best results and to prevent burning out the lower head of thechamber.

A still further object consists in the provision of novel means forsupporting a fuel bed and novel means whereby clinkers or ashes may beremoved.

With the above and other objects in View, which will appear as thedescription proceeds, our invention consists in the novel details ofconstruction, and arrangement of parts described in the followingspecification and illustrated in the accompanying drawing, and while wehave illustrated and described the preferred embodiments of theinvention, as they now appear to us, it will be understood that suchchanges may be made as will fall within the scope of the appendedclaims.

In the drawing:-

.Fig. 1 is a side elevation.

Fig. 2 is a top plan. 7

Fig. 3 is a transverse vertical section with parts shown in sideelevation, and 1 Fig. 4 is a horizontal section on the line 4-4 of Fig.3 looking in the direction of the arrows.

In that form of our invention disclosed in Figs. 1 to 4 inclusive Iindicates the outer casing and 2 the inner or combustion chamber sopositioned within the outer casing as to provide a space around itssidewall and beyond its heads to allow for the circulation of waterwithin the casing. The outer casing includes the cylindrical side wall,the top head 3, and thebottom head 4, the bottom head being inset abovethe lower end of the casing as shown more particularly in Fig. 3 of thedrawing. The bottom head 4 is provided with the manhole 5 normallyclosed by the plate or cap 6 and the top head is provided with the two'manholes! normally closed by the plates or caps 8. Water is introducedinto the casing I through means. of the pipe 9 and steam or water ray beremoved from the top" of the casing by means of the pipe iii. At N wehave illustrated a door normally closing'an opening in the casingwhereby clinkers 1nay be removed from the fire bed'when desired.

The inner or combustion chamber 2 consists of the circuinferentiallycorrugated side wall l2,the top head i3, and the bottomhead M, the tophead being provided with an opening l5 surrounded by the upwardlyextending flange 16 in which is telescoped the depending flange ll ofthe cap I8. A fuse plug i9 is provided in the cap l8 to act as a safetyblow-off should the water within the casing 1 fall to a level below theupper surface of the cap fact that the flange i6 and associated cap '18provide an extending portion above the upper surface of the head it toprevent burning out of the head 13. As has been previously stated thefuse plug, being carried by the cap 58 will blow out when the waterwithin the casing reaches a level below the top of the cap and thusprevents the water from reaching a level below the top head iii of thechamber 2 which would cause the head to burn out. The bottom head it isprovided with the opening 25 arranged off-center and positioned at apoint adjacent the opening closed by the door H for a purpose which willbe later apparent. Depending from the opening 2% is a sleeve 2| whichleads to and communicates with an opening 22 formed in the bottom head 4of the casing I. The lower end of the sleeve 2i is secured to anupwardly extending flange 23 formed around the opening 22 and secured tothe head 4 and depending therefrom is an air box or chamber 24 having anair inlet 25 to which, if desired, a fan may be attached. An innersleeve 26 is positioned within the opening 2d formed in the head l4 andextending through this sleeve is the upper portion of a member 2?forming a part of or secured to an automatic Stoker of any desired form.The member 21 is of such a diameter as to form the space between thesame and the sleeve 26 to provide an air passage and the upper end ofthe member has the outwardly'extending flange 29 which will be spacedabove the upper end of the. sleeve 26 to provide an air passage.Perforations 30 are formed in the member 21 and allow air to pass to theinterior of the member to allow proper burning of the fuel. The fuel is.fed into the member 2'! through the opening 3| of an extension whichwill pass through the side of the air box or chamber 2d. r

A vertically extending wall 32 extends from the bottom head M of theinner or combustion chamber 2 and terminates at a point below the upperhead l3 as shown more particularly in Fig. 3 of the drawing. Verticallyextending water tubes We wish to lay particular stress on the 7 ja V 33are positioned within the chamber 2, on both sides of the wall 32 andtheir ends pass through the heads [3 and I4 to communicate with theinterior ofthe casing 1. Thus water within the 2 5 casing I willcirculate through these tubesi We wish to lay particular emphasis on themanner in which the tubes. are arranged so as to fcrm a space over theopening 20 in the bottom head M as shown more particularly in 4 of thedrawing. This space forms a clearance for the bed of fuel and the fuelwill engage those'tubes surrounding the space. At 34 I have shown a fluefor taking off the products of combustion, the lower end of the fluecommunicating with the chamber 2 as shown more particularly in Fig. 3

the hot bed of fuel supported above the head and directly within thechamber 2 all heat is utilized for heating the tubes and side wall ofthe chamber. At the same time, as previously stated, the hot bed of fuelwill engage those tubes adjacent the bed and so aid in the heating. Theproducts of combustionpass upwardly and over the upperend of the wall 32and then pass downwardly and out through the flue 34. Proper air isprovided for causing the fuel to burn, such air entering the box orchamber 24, passing through the space '26, the space 'beneath'the flange29, andthrough theperforations 28. With our construction and arrangementof manholes access may be had interiorly of the casing I and chamber'2for cleaning purposes and for replacing parts which may be worn. Thefuel bed is positioned at such a point relative to the opening closed bythe door II to permit ready removal of any clinkers which may form;

In' our boiler it will be noted that the heat is introduced directlyinto the combustion chamber, above the upper surface of the lower headthereof, and directed against the water tubes. It will also be notedthat the innermost water tubes are engagedrby the bed or mass of fueland form a support therefor. The sides of the combustion chamber arecorrugated to add strength thereto but when desired stay bolts may beused. Our boiler'may be used for any desired purposesuch as dairies orsimilar places where a large amount of steam is necessary, and, of

course, we do not desire to be limited by such use. By introducingtheheat directly with the combustion chamber above the upper surface of thelower head the life of the lower head will be prolonged and the headwill not so readily be burned out. a

Having fully described our invention what we claimas new and desire tosecure by Letters Patent is:

1. A boiler of the character described including an outercasing formedwith a side-wall and upper and lower heads, a separate and distinctcombustion chamber formed with a side wall and upper and lower heads,the combustion chamber being positioned within the outer casing with itsside wall and heads spaced from the side wall .and'heads of the casingand the heads of the combustion chamber having aligned openingspositioned off center, a door carried by the outer casing and adapted tonormally close an entrance open n t t om us n chamber, .said. en-

trance opening being positioned'in close proximity to the opening in thelower head of the combustion chamber, water tubes positioned between theheads of the combustion chamberand surrounding the openings in' theheadstherecf with the exception of a space aligned with the entranceopening, a member positioned in the opening of the lower head of thecombustion chamber for supporting a bed of fuel above the lower headwhereby heat is generated directly in' the combustion chamber above thelower head thereof 2. Aboilerof the character described includf ing anouter casing formed with a side wall and upper and lower heads,aseparate anddistinct combustion chamber. formed with aside-well upperand lower heads the combustion being positioned within the. outer casingwith its side wall and heads: spaced from filmame wall and heads ofthew-sing and the, lowerlaead of the combustion chamber having an.opening positioned of! center, adoor by the outer casing and adaptedtonormally close an entrance opening to the combustion chamber, said en-7 trance opening being positioned in close proximity to the openinginthe lower head of theccmbustion chamber, water tubes positionedbetween the heads of the combustion chamber, and surrounding the,opening. in the. lower'head thereof 7 with the exception of arspacealigned with the entrance opening, a member positioned in the opening ofthe lower headof the combustion chamber for supporting ,a. bed of fuel,abofvethe 7 lower head whereby heat is generated directly in thecombustion chamber above the. lower head thereof and into directengagement with certain of the water tubes surrounding the opcmng,

means for conveying spent heat from. the com,- bustion chamber, and abaille wall positionedin the combustion chamber between the bed ,ct iueland the means for conveying the'spent heat.

7 3. A boiler of the character described including an outer casingformed with a side wall and upper and lower. heads. a scnamte anddistinct combustion chamber formed with a. side wall and upper and lowerheads, vthe combustion chamber being positioned within. the outer casingwith its side wall and heads spaced from the side wall and heads of thecasing and the lower head 0! the combustion chamber having an' opening;positioned off center, a door carried by the outer casing and adapted tonormally close an entrance opening to the combustion chamber, saidentrance opening being positioned. in; close proximity to the opening inthe lower head of the combustion chamber, water tubes positioned .be-.tweenthe heads of the combustion'chamber. and surrounding the openingin the lower head thereof with the exception of a space aligned with theentrance opening, and a; member depending through the opening of thelower head of the combustion chamber for supporting a bed of fuel abovethe lower head whereby heat is generated

